重新window.onerror方法就行了
window.onerror = handleError function handleError(msg,url,l) { var txt="There was an error on this page. " txt+="Error: " + msg + " " txt+="URL: " + url + " " txt+="Line: " + l + " " txt+="Click OK to continue. " alert(txt) return true } //如果返回值为 false,则在控制台 (JavaScript console) 中显示错误消息。反之则不会